Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD4TM callsign genealogy
Currently held by Calhoun Jr, Ralph V
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AD4TM's current licensee, walking backwards.
- Calhoun Jr, Ralph VFLgranted 2021-04-06cancelled 2022-12-23
Successor callsigns
Callsigns held now by people who previously held AD4TM.
- BENNETT JR, FREDERICK EVAgranted 2020-04-03
All historical holders
Every license row we've seen with the callsign AD4TM, oldest first.
- BENNETT JR, FREDERICK E VA1994-07-14 → cancelled 2000-07-01
- Calhoun Jr, Ralph V FL2022-12-23 active